function hideDiv(pass) { 
var divs = document.getElementsByTagName('div'); 
for(i=0;i<divs.length;i++){ 
if(divs[i].id.match(pass)){//if they are 'see' divs 
if (document.getElementById) // DOM3 = IE5, NS6 
divs[i].style.visibility="hidden";// show/hide 
else 
if (document.layers) // Netscape 4 
document.layers[divs[i]].display = 'hidden'; 
else // IE 4 
document.all.hideShow.divs[i].visibility = 'hidden'; 
} 
} 
}

function showDiv(pass) { 
var divs = document.getElementsByTagName('div'); 
for(i=0;i<divs.length;i++){ 
if(divs[i].id.match(pass)){ 
if (document.getElementById) 
divs[i].style.visibility="visible"; 
else 
if (document.layers) // Netscape 4 
document.layers[divs[i]].display = 'visible'; 
else // IE 4 
document.all.hideShow.divs[i].visibility = 'visible'; 
} 
} 
} 

function azzera(){
hideDiv('flash');
hideDiv('benvenuto');
hideDiv('chi');
hideDiv('presentazione');
hideDiv('storia');
hideDiv('mappa');
hideDiv('etichetta');
hideDiv('contattaci');
hideDiv('flash2');
hideDiv('prodotti');
hideDiv('clienti');
hideDiv('sitemap');
hideDiv('nome');
hideDiv('email');
hideDiv('email2');
hideDiv('messaggio');
}